Ecological concrete and preparation method thereof

Abstract

The invention discloses ecological concrete. The ecological concrete is prepared from the following raw materials in parts by weight: 20 to 60 parts of high-strength gypsum; 10 to 25 parts of plant ash; 5 to 8 parts of mineral powder; 20 to 40 parts of a biogas residue pulverizing material; 0.05 to 0.5 part of a polycarboxylate superplasticizer; 1 to 2 parts of a admixture; and 5 to 20 parts of water; the preparation method of the biogas residue pulverizing material comprises the following steps: biogas residues in a biogas anaerobic fermentation tank are subjected to plate and frame filtration to obtain the biogas residues with a moisture content of 55 to 70wt%, and the biogas residues are air-dried until the moisture content is less than 10wt%; and the biogas residues with the moisture content less than 10wt% is fed into a pulverizer to be pulverized into loose powder. The ecological concrete is suitable for plant growth while achieving resource recycling.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to an ecological concrete and a preparation method thereof. Background technique [0002] Ecological concrete, also known as porous concrete, refers to a kind of special concrete material with special structure and surface characteristics, which can reduce environmental load, adapt to biological growth, adjust ecological balance, beautify environmental landscape, and realize the coordination between human beings and self-identity. have a positive effect. [0003] At present, cement is used as the cementitious material for the preparation of ecological concrete. In the process of cement hydration, strong alkaline hydration products such as calcium hydroxide will be produced (even a small amount of cement will be hydrated to produce calcium hydroxide), resulting in a strong alkaline environment, which is harmful to plants. The growth environment has an adverse effect, which is not...

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Problems solved by technology

[0003] At present, cement is used as the cementitious material in the preparation of ecological concrete. During the hydration process of cement, strong alkali hydration products such as calcium hydroxide will be produced (even if very little cement will be hydrated to produce calcium hydroxide), resulting in a strong alkali environment, which is harmful to plants. The growth environment has an adverse effect, which is not conducive to the early germination of plants and the long-term growth in the later period, and the plants do not germinate or the growth rate of the next year is low.